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MathML Test : Special constants

This is a test to check if symbols from logic can be displayed.

• CapitalDifferentialD : $Dx$
• DifferentialD : $dx$
• ExponentialE : $e$
• ImaginaryI : $i$

Some examples :

• $e^{i\pi }-i^2=0$
• $\frac{d\left(x^{\alpha }\right)}{dx}=\alpha x^{\alpha -1}$
• $D_{h}f\left(a\right)=\sum _{i=1}^p{h}_i{D}_{i}f\left(a\right)$